纳米晶
钙钛矿(结构)
电致发光
材料科学
二极管
发光二极管
光致发光
纳米技术
量子点
微尺度化学
光电子学
化学
结晶学
数学
数学教育
图层(电子)
作者
Dan Liŭ,Kangkang Weng,Haifeng Zhao,Song Wang,Hengwei Qiu,Xisheng Luo,Shaoyong Lu,Tianyu Huang,Sai Bai,Hao Zhang,Shanpeng Li
出处
期刊:ACS Nano
[American Chemical Society]
日期:2024-02-20
卷期号:18 (9): 6896-6907
标识
DOI:10.1021/acsnano.3c07975
摘要
Microscale patterning of colloidal perovskite nanocrystals (NCs) is essential for their integration in advanced device platforms, such as high-definition displays. However, perovskite NCs usually show degraded optical and/or electrical properties after patterning with existing approaches, posing a critical challenge for their optoelectronic applications. Here we achieve nondestructive, direct optical patterning of perovskite NCs with rationally designed carbene-based cross-linkers and demonstrate their applications in high-performance light-emitting diodes. We reveal that both the photochemical properties and the electronic structures of cross-linkers need to be carefully tailored to the material properties of perovskite NCs. This method produces high-resolution (∼4000 ppi) NC patterns with preserved photoluminescent quantum efficiencies and charge transport properties. Prototype light-emitting diodes with patterned/cross-linked NC layers show a maximum luminance of over 60000 cd m–2 and a peak external quantum efficiency of 16%, among the highest for patterned perovskite electroluminescent devices. Such a material-adapted patterning method enabled by designs from a photochemistry perspective could foster the applications of perovskite NCs in system-level electronic and optoelectronic devices.
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